Heating unit for use in waving human hair



March 1, 1932. w, sc n-z 1,847,673

HEATING UNIT FOR USE IN WAVING HUMAN HAIR Filed Feb. 24. 1928 my 25 1z-+- W i my Patented Mar. 1, 1932 g cmren STATES PATENT own-ace WILLIAM scnmrz, on new YORK, N'. Yl, ASSIGNOR TO EUGENE, man, on NEW YORK,

' N. Y., A ooarom'rion OF NEW YORK HEATING UNIT FOR USE IN WAVING HUMAN HAIR Application filed February 24, 1928. Serial No. 256,733.

- This invention relates to heating units for use in waving human hair, and has for an object to provide such a device which may be handled with greater facility and comfort than heretofore, and which may be employed for waving that portion of the hair very close to the head without danger of injur or inconvenience to the subject being treatedi Another object consists in providing such a device in which the entire exterior is not I only electrically insulated, but also protected against the radiation of heat, whereby danger of burningthe scalp of the subject or the j c'lose to or in contact with the scalp of the subject or hands of the operator. Accordingl the construction contemplates avery effectiv'e protection against heat for the exterior without in any wise interfering with the generation and radiation of heat at the interior. This protection is not only for the purpose of avoiding injury from heat employed during thenormal operation, but also for the safeguarding of the subject and operator in case of a short circuit or other irregular oondition of the device. A practical embodiment of the invention is 40 represented in the accompanying drawings,

in which Fig. 1 represents a top plan View of the device, partly broken away; 1

Fig. 2 represents a side elevation partly in section; and

Fig. 3 represents a section taken in the plane of the line IIIIII of Fig. 2 looking in the direction of the arrows.

The device or heating unit includes an inner tubular portion 1, which is preferably Another object consists in providing such coniposed of some suitable metal that has a certain amount of strength and ready heat conductivity.

Intermediate the ends of the tube 1, and nearer to its upper portion, there is provided an outwardly extending annular flange 2. A pair of resistances "3, 4, are coiled around the tube 1, near its upper and lower portions respectively, and the said resistances are surrounded by an insulating member 5 composed of any suitable material such, for instance, as mica. p

The said resistances3,4 are connected with lead-in wires 6, 7, 8, which are secured to terminals 9, 10, 11, respectively. The connection of the said wires with the resistance units (3 and 1, is such that current may be supplied to either or both resistances as desired. This arrangement is now well understood in the art, and is for the purpose of applying the desired heat treatment to the entire section of hair being treated, or to its inner or outer portion, as the best practice prescribes -during the stages of the waving operation, and

according to the conditions prevailing in the individual case. p

The said terminals 9,10 and 11, consist of screws, as particularly indicated in connection with terminal 10, that traverse a ring 12,

10f suitable insulatingmaterial, such as bakeflite, and arethreaded into the flange 2 on the tube 1. Thisprovisi-on of the ring 12 furnishes a suitable support for the terminals,

andthe threading of the screws into the flange 2 serves tohold the parts inassembl'y.

A'he'ad piece 13, also composedof bakelite or other suitable insulating material, has a reduced portion 14 in the form of a downwardly extending collar'that is fitted to rest ,uponthe top o'friiig 12. It will'be noted that the said head piece (and collar snugly -fit the exterior: surface of the top of the tube 1, and thatlthe head piece is shouldered so as to'overlap the top' edge of the "said tube.

T hehe'ad piece also has an upstanding portion 15 which is pierced with three vertical "channels to receive the ends'of the lead-in wires 6, 7, 8, as'clearly shown in Figs. 1 and 2.

The said upstanding portion 15 has a lateral projection 16 which is in the *form of a loop and is calculated to serve as a handle for the purpose of enabling the operator to grasp the device or unit at a distance from the heat generating members so as to protect his hand from discomfort.

The shell or exterior covering is denoted by 17, and may also be composed of bakelite or other material which is both electric and heat insulating. The said shell is suitably shaped and has its upper part of such size to snugly receive the exterior walls of the ring 12 and head piece 13, as clearly shown in Fig. 2. A shoulder 18 serves as a seat to prevent the ring 12 from downward movement in the shell 17 and suitable fastening devices, such as screws 19, pierce the walls of the shell and enter the head piece 13 in order to hold these parts in position.

The fact that collar 1% is reduced in diameter provides a space between it and the shell 17, which space is bounded above by head piece 13 and below by ring 12, as clearly shown in Fig. 2. This space serves as an annular chamber to receive the lead-in wires (3, "i, and 8, two of which, (5 and 8, traverse a portion of said chamber to reach their terminals 9 and 11, as illustrated in Fig. 1.

The lower end of the shell is turned in and formed to constitute two shoulders 20, 21, the first of which establishes a rest for the lower resistance t and insulating member 5, while the second receives and covers the lower edge of the tube 1. This shoulder 21, together with the shoulder on head piece 13, provides heat insulation protection for the edges of the tube 1 so that, in this aspect, the head piece 13 may be regarded as, in effect, a portion of the shell 17.

The tube 1 is divided horizontally into two sections as indicated in dotted lines in Fig. 2, so as to accommodate itself to the pair of resistances. This construction is well understood in the art and need not be further described, except to say that the two portions are held in assembly by suitable hollow posts 22, 23, 24, 25, two of which, such as 22 and 24;, may serve as conduits for the Wires leading to resistance 4 of the lower section, as indicated in Fig. 3. This construction is also familiar to the art.

Suitable openings 26 are provided in the shell 17 in order to accommodate the escape of fumes generated by the chemical composition employed in the treatment.

The manner of applying the device or unit over and around the coiled strand of hair, together with the application of the desired chemical, as well as the general handling of the unit, are thoroughly understood by operators in the art, so that the same will not herein be set forth.

The unitary construction of the shell and its complete covering of the inner operative elements of the device accomplishes in a thoroughgoing manner the protective object, and the covering of the ends of the tube 1 by the shoulder 21 on the shell and by the shoulder on the head piece 13 perfects the said attainment.

It will be understood that various changes may be resorted to in the form, construction and arrangement of the several parts without departing from the spirit and scope of my invention; hence I do not intend to be limited to the details herein shown and described except as they may be included in the claims.

What I claim is:

1. A device of the character described comprising, heating means, a heat insulating shell covering the same, a head piece of heat insulating material at one end of said shell having an upstanding portion serving as a. conduit for a plurality of lead-in wires, and a handle projecting laterally from said up scanding portion.

2. A device oi the character described comprising, a heat transmitting tube, a heat insuiating shell surrounding the tube and providing a seat for the lower edge thereof, a head piece of heat insulating material on said shell arranged to cover the upper edge of the tube, said head piece having an upstanding portion provided with conduits for lead-in wires, and a handle projecting laterally from said upstanding portion.

3. A device of the character described comprising, a heating means, a heat transmittin tube, and a heat insulating shell covering the exterior surface and both ends thereof, said snell including a seat and support for those l1ClS of the tube and heating means which are proximate to a subjects scalp when the device is in use, and being provided with openings for permitting the sees as of fumes.

In testimony, that I claim the foregoing as my invention, I have signed my name this 16th day of January, 1928.

WILLIAM SCHMITZ. 

